Negative - registration fee. If you got extra money lying around then donate it to a charity.
unless there is something I missed in 30 seconds such as people would type it in as a typo and it's not infringing on sex.com, I would have to agree with silentg.
I think there is an adult domains name thread(s) on this or other forums where you can talk about who much name like FmeHard.com are worth, but I don't go there.